A communication and control system includes a command device for
generating a command signal and an input device for generating a data
signal. A first device of the system receives the command and data
signals to generate a transmission signal. A second device of the system
receives the transmission signal and extracts the command signal and the
data signal from the transmission signal. The system also includes a
target device, which is controlled as a function of the command signal,
and an output device, which receives the data signal.